#N canvas 491 108 450 300 10;
#X obj 30 88 inlet~;
#X obj 30 136 outlet~;
#X text 33 169 using [expr~] is slower than doing it in C...;
#X text 319 21 part of zexy;
#X text 250 261 updated for zexy-2.0;
#X obj 30 112 expr~ if ($v1<0 \, -1 \, if ($v1>0 \, 1 \, 0));
#X text 36 44 [sgn~];
#X text 33 187 therefore we _also_ provide [sgn~] as external.;
#X connect 0 0 5 0;
#X connect 5 0 1 0;